DT physical properties

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Across
  1. 4. An instrument used for drawing or testing right angles
  2. 6. the ability to allow some light through a material
Down
  1. 1. How easy it is the melt a material
  2. 2. The amount of matter in a material
  3. 3. The resistance to scratching abrasion indentation
  4. 5. The ability to stop all light traveling through a material
  5. 7. A hand tool for cutting wood and other materials